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A wonderful command line utility to check the internet usage. It has got so many useful switch to display the data you want.Please visit the man page to get all the information.Get it from this website http://humdi.net/vnstat
To get the connection information of protocol tcp and extended infortmation.
As mentioned in the summery that it is a powerful command to monitor system activity in great way. It has got the power of vmstat,iostat,mpstat,df,free and sar.Instead of firing each single command separately ,one can fire one single command to get all the info at once.But there is a way to get the individual information too. Please see the man page . You can get it from here : http://dag.wieers.com/home-made/dstat/
Add this to your $HOME/.bashrc file. It will only set this prompt if it is running inside screen ($WINDOW var is set)
Looks like this...
Puts words on new lines, removing additional newlines.
Simply translates whitespace to newlines. Could be enhanced to compress out extra newlines, but that might be better handled in the next tool down the pipe, with eg uniq(1).
Found this one little more for me. This one removes the perl dependency (from command 2535).
Source for command : http://www.earthinfo.org/linux-disk-usage-sorted-by-size-and-human-readable/
This command displays a clock on your terminal which updates the time every second. Press Ctrl-C to exit.
A couple of variants:
A little bit bigger text:
watch -t -n1 "date +%T|figlet -f big"
You can try other figlet fonts, too.
Big sideways characters:
watch -n 1 -t '/usr/games/banner -w 30 $(date +%M:%S)'
This requires a particular version of banner and a 40-line terminal or you can adjust the width ("30" here).
With this command you can use shell variables inside sed scripts.
This is useful if the script MUST remain in an external file, otherwise you can simply use an inline -e argument to sed.
This is a working version, though probably clumsy, of the script submitted by felix001. This works on ubuntu and CygWin. This would be great as a bash function, defined in .bashrc. Additionally it would work as a script put in the path.
I often deal with long file names and the 'ls -l' command leaves very little room for file names. An alternative is to use the -h -o and -g flags (or together, -hog).
* The -h flag produces human-readable file size (e.g. 91K instead of 92728)
* The -o suppresses the owner column
* The -g suppresses the group column
Since I use to alias ll='ls -l', I now do alias ll='ls -hog'
Alias two dots to move to parent directory. Put it into your .bashrc or .profile file.